2a6d284d76
* amd64-nat.c: New file. * amd64fbsd-nat.c: Include "amd64-nat.h". (REG_ADDR, GETREGS_SUPPLIES): Remove macros. (amd64fbsd32_r_reg_offset): New variable. (supply_gregset): Simply call amd64_supply_native_gregset. (fill_gregset): Rename `regno' to `regnum'. Simply call amd64_collect_native_gregset. (fill_fpregset): Rename `regno' to `regnum'. (fetch_inferior_registers): Rename `regno' to `regnum'. Replace usage of GETREGS_SUPPLIES with amd64_native_gregset_supplies_p. Use `struct reg' and `struct fpreg' instead of `gregset_t' and `fpregset_t'. Call amd64_supply_native_gregset instead of supply_gregset. Call x86_64_supply_fxsave instead of supply_fpregset. (store_inferior_registers): Rename `regno' to `regnum'. Replace usage of GETREGS_SUPPLIES with amd64_native_gregset_supplies_p. Use `struct reg' and `struct fpreg' instead of `gregset_t' and `fpregset_t'. Call amd64_collect_native_gregset instead of fill_gregset. Call x86_64_collect_fxsave instead of fill_fpregset. (_initialize_am64fbsd_nat): Initialize amd64_native_gregset32_reg_offset and amd64_native_gregset64_reg_offset. * config/i386/fbsd64.mh (NATDEPFILES): Add amd64-nat.o.
304 lines
8.2 KiB
C
304 lines
8.2 KiB
C
/* Native-dependent code for FreeBSD/amd64.
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Copyright 2003 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "inferior.h"
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#include "regcache.h"
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#include "gdb_assert.h"
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#include <signal.h>
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#include <stddef.h>
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <sys/sysctl.h>
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#include <machine/reg.h>
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#ifdef HAVE_SYS_PROCFS_H
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#include <sys/procfs.h>
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#endif
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#ifndef HAVE_GREGSET_T
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typedef struct reg gregset_t;
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#endif
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#ifndef HAVE_FPREGSET_T
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typedef struct fpreg fpregset_t;
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#endif
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#include "gregset.h"
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#include "x86-64-tdep.h"
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#include "amd64-nat.h"
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/* Offset to the gregset_t location where REG is stored. */
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#define REG_OFFSET(reg) offsetof (gregset_t, reg)
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/* At reg_offset[REGNUM] you'll find the offset to the gregset_t
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location where the GDB register REGNUM is stored. Unsupported
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registers are marked with `-1'. */
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static int reg_offset[] =
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{
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REG_OFFSET (r_rax),
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REG_OFFSET (r_rbx),
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REG_OFFSET (r_rcx),
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REG_OFFSET (r_rdx),
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REG_OFFSET (r_rsi),
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REG_OFFSET (r_rdi),
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REG_OFFSET (r_rbp),
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REG_OFFSET (r_rsp),
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REG_OFFSET (r_r8),
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REG_OFFSET (r_r9),
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REG_OFFSET (r_r10),
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REG_OFFSET (r_r11),
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REG_OFFSET (r_r12),
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REG_OFFSET (r_r13),
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REG_OFFSET (r_r14),
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REG_OFFSET (r_r15),
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REG_OFFSET (r_rip),
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REG_OFFSET (r_rflags),
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-1,
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-1,
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-1,
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-1
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};
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/* Mapping between the general-purpose registers in FreeBSD/amd64
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`struct reg' format and GDB's register cache layout for
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FreeBSD/i386.
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Note that most FreeBSD/amd64 registers are 64-bit, while the
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FreeBSD/i386 registers are all 32-bit, but since we're
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little-endian we get away with that. */
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/* From <machine/reg.h>. */
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static int amd64fbsd32_r_reg_offset[I386_NUM_GREGS] =
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{
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14 * 8, 13 * 8, /* %eax, %ecx */
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12 * 8, 11 * 8, /* %edx, %ebx */
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20 * 8, 10 * 8, /* %esp, %ebp */
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9 * 8, 8 * 8, /* %esi, %edi */
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17 * 8, 19 * 8, /* %eip, %eflags */
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18 * 8, 21 * 8, /* %cs, %ss */
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-1, -1, -1, -1 /* %ds, %es, %fs, %gs */
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};
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/* Transfering the registers between GDB, inferiors and core files. */
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/* Fill GDB's register array with the general-purpose register values
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in *GREGSETP. */
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void
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supply_gregset (gregset_t *gregsetp)
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{
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amd64_supply_native_gregset (current_regcache, gregsetp, -1);
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}
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/* Fill register REGNUM (if it is a general-purpose register) in
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*GREGSETPS with the value in GDB's register array. If REGNUM is -1,
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do this for all registers. */
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void
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fill_gregset (gregset_t *gregsetp, int regnum)
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{
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amd64_collect_native_gregset (current_regcache, gregsetp, regnum);
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}
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/* Fill GDB's register array with the floating-point register values
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in *FPREGSETP. */
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void
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supply_fpregset (fpregset_t *fpregsetp)
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{
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x86_64_supply_fxsave ((const char *) fpregsetp, -1);
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}
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/* Fill register REGNUM (if it is a floating-point register) in
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*FPREGSETP with the value in GDB's register array. If REGNUM is -1,
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do this for all registers. */
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void
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fill_fpregset (fpregset_t *fpregsetp, int regnum)
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{
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x86_64_fill_fxsave ((char *) fpregsetp, regnum);
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}
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/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
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for all registers (including the floating point registers). */
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void
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fetch_inferior_registers (int regnum)
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{
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if (regnum == -1 || amd64_native_gregset_supplies_p (regnum))
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{
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struct reg regs;
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if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) ®s, 0) == -1)
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perror_with_name ("Couldn't get registers");
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amd64_supply_native_gregset (current_regcache, ®s, -1);
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if (regnum != -1)
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return;
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}
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if (regnum == -1 || regnum >= FP0_REGNUM)
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{
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struct fpreg fpregs;
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if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't get floating point status");
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x86_64_supply_fxsave ((const char *) &fpregs, -1);
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}
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}
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/* Store register REGNUM back into the inferior. If REGNUM is -1, do
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this for all registers (including the floating point registers). */
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void
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store_inferior_registers (int regnum)
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{
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if (regnum == -1 || amd64_native_gregset_supplies_p (regnum))
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{
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struct reg regs;
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if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) ®s, 0) == -1)
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perror_with_name ("Couldn't get registers");
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amd64_collect_native_gregset (current_regcache, ®s, regnum);
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if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) ®s, 0) == -1)
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perror_with_name ("Couldn't write registers");
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if (regnum != -1)
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return;
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}
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if (regnum == -1 || regnum >= FP0_REGNUM)
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{
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struct fpreg fpregs;
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if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't get floating point status");
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x86_64_fill_fxsave ((char *) &fpregs, regnum);
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if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't write floating point status");
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}
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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void _initialize_amd64fbsd_nat (void);
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void
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_initialize_am64fbsd_nat (void)
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{
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int offset;
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amd64_native_gregset32_reg_offset = amd64fbsd32_r_reg_offset;
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amd64_native_gregset64_reg_offset = reg_offset;
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/* To support the recognition of signal handlers, i386bsd-tdep.c
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hardcodes some constants. Inclusion of this file means that we
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are compiling a native debugger, which means that we can use the
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system header files and sysctl(3) to get at the relevant
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information. */
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#define SC_REG_OFFSET amd64fbsd_sc_reg_offset
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/* We only check the program counter, stack pointer and frame
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pointer since these members of `struct sigcontext' are essential
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for providing backtraces. */
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#define SC_RIP_OFFSET SC_REG_OFFSET[X86_64_RIP_REGNUM]
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#define SC_RSP_OFFSET SC_REG_OFFSET[X86_64_RSP_REGNUM]
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#define SC_RBP_OFFSET SC_REG_OFFSET[X86_64_RBP_REGNUM]
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/* Override the default value for the offset of the program counter
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in the sigcontext structure. */
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offset = offsetof (struct sigcontext, sc_rip);
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if (SC_RIP_OFFSET != offset)
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{
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warning ("\
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offsetof (struct sigcontext, sc_rip) yields %d instead of %d.\n\
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Please report this to <bug-gdb@gnu.org>.",
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offset, SC_RIP_OFFSET);
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}
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SC_RIP_OFFSET = offset;
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/* Likewise for the stack pointer. */
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offset = offsetof (struct sigcontext, sc_rsp);
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if (SC_RSP_OFFSET != offset)
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{
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warning ("\
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offsetof (struct sigcontext, sc_rsp) yields %d instead of %d.\n\
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Please report this to <bug-gdb@gnu.org>.",
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offset, SC_RSP_OFFSET);
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}
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SC_RSP_OFFSET = offset;
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/* And the frame pointer. */
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offset = offsetof (struct sigcontext, sc_rbp);
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if (SC_RBP_OFFSET != offset)
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{
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warning ("\
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offsetof (struct sigcontext, sc_rbp) yields %d instead of %d.\n\
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Please report this to <bug-gdb@gnu.org>.",
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offset, SC_RBP_OFFSET);
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}
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SC_RBP_OFFSET = offset;
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/* FreeBSD provides a kern.ps_strings sysctl that we can use to
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locate the sigtramp. That way we can still recognize a sigtramp
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if its location is changed in a new kernel. Of course this is
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still based on the assumption that the sigtramp is placed
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directly under the location where the program arguments and
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environment can be found. */
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{
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int mib[2];
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int ps_strings;
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size_t len;
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mib[0] = CTL_KERN;
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mib[1] = KERN_PS_STRINGS;
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len = sizeof (ps_strings);
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if (sysctl (mib, 2, &ps_strings, &len, NULL, 0) == 0)
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{
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amd64fbsd_sigtramp_start = ps_strings - 32;
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amd64fbsd_sigtramp_end = ps_strings;
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}
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}
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}
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